Dog biscuit



FIG. 1 is a top, front and left side perspective view of a dog biscuit according to our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a right side elevation view thereof. 

CLAIM The ornamental design for a dog biscuit, as shown. 